Question

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Answer 1

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Answer 2

Answer:

if angle 1 = 120 then

angle 2 = 120 / vertically opposite angle

therefore angle 4= angle 3

now ,

angle 1 + angle 3 = 180 / linear pair

then angle 3 = 180 - angle 1

angle 3 =180 - 120 = 60

therefore angle 4= 60

angle 2 =120, angle 3=60, angle 4= 60